WIA GC/11299 | Warburg, Aby to Kiesselbach, Wilhelm 20/11/1910 | he is happy to support Kiesselbach's initiative to help 'poor' Felix Scheidt; forwards money |
WIA GC/1368 | Kiesselbach, Wilhelm to Warburg, Aby 04/04/1904 | he purchased a copy of Warburg's book and greatly enjoyed reading it |
WIA GC/20166 | Warburg, Aby to Friederichsen, Richard 15/06/1928 | informs him that he has spoken to Wilhelm Kiesselbach who is prepared to accept the post of... |
WIA GC/20533 | Warburg, Aby to Kiesselbach, Wilhelm 30/05/1928 | on the newly-founded firm Friederichsen, de Gruyter & Co. in Hamburg; Warburg interested them in... |
WIA GC/23382 | Warburg, Aby to Warburg, Mary 20/11/1902 | refers to the characterisation of Mary according to Duscha's [Irma von Duczynska's] palm reading... |